http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박찬헌,도성국 한국의류학회 1987 한국의류학회지 Vol.11 No.1
Silk fibroin is likely to be hydrolyzed by acids or alkalies at high temperature, and the degree of the hydrolysis has been inferred from the changes in tensile strength and elongation. But, in this experiment, it was intended to infer that from the quantitative changes in terminal aminp group content as well as in tensile strength and elongation. Silk yarn was treated with boiling water, hydrochloric acid, and sodium hydroxide under various conditions. The boiling water somewhat degraded silk fibroin. Silk yarn treated with sodium hydroxide contained more terminal amino group than that treated with hydrochloric acid. This result agreed fairly well with the loss in weight, tensile strength, and elongation; the terminal amino group content increased with the decrease of tensile strength, elongation, and weight. The damage by sodium hydroxide to the silk fibroin was greater than that by hydrochloric acid.
젤라틴에 대한 Methyl Methacrylate의 유화 그라프트 공중합(II) -젤라틴 농도, 반응시간 및 온도가 그라프트 공중에 미치는 영향-
박찬헌,박천욱 한국섬유공학회 1988 한국섬유공학회지 Vol.25 No.4
Emulsion graft copolymerization of methyl methacrylate (MMA) onto gelatin in aqeous solution by potassium persulfate (KPS) with sodium lauryl sulfate (NaLS) as an emulsifier was carried out under different conditions such as variations in gelatin concentration, reaction time, and reaction temperature. The grafting efficiency was gradually increased with gelatin concentration, however, the graft yield was increased and then decreased around a certain fixed concentration. The grafted poly(methyl methacrylate) (g-PMMA) was produced rapidly in the early stage but the grafting efficiency was decreased in about 4 hours as the copolymerization was nearly completed. The gelatin conversion, the MMA conversion, and the graft yield were increased markedly, but the grafting efficiency slightyl, with the temperature.
카플링제를 도입한 탄소섬유/나일론/복합재료의 기계적 성질(I) -카플링제(Nylon 6-g-PAAnl)의 합성-
박찬헌,신은주 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.10
In order to improve the interfacial adhesion of carbon fiber - nylon 6 composites, n polymer(GP), nylon 6-g-polyacrylamide(PAAm), was synthesized for interfacial bonding agent by suspension Via polymerization. Nylon 6 powders were suspended in aqueous solution of acrylamide(Ahm) and cerium ammonium nitrate(CAN) as an initiator. The produced GP was separated into mfresol soluble type and water dispersable type, The production ratio of mfresol soluble GP to the total GPI percent yafiing, yafiing efEciency, AAm conversion, and nylon 6 conversion under various polymerization conditions were determined. The polymerization reaction proceeded likely at the interface between suspended nylon 6 and AAm absorbed to the surface of nylon 6 particles. The uafiing efficiency and nylon 6 conversion are 70 and 50% respectively. The production quantity of the water dispersable GP is higher than that of the mfresol soluble GP.
제라틴에 대한 Methyl Methacyrlated의 유화 그라프트 공중합(III)
박찬헌,박천욱,도성국 한국섬유공학회 1992 한국섬유공학회지 Vol.29 No.3
Emulsion graft copolymerization of methylmethacrylate(MMA) onto gelatin in aqueous solution by potassium persulfate(KPS) with sodium lauryl sulfate(SLS) as an emulsifier was carried out under different conditions such as variation in the concentration of emulsifier, initiator, monomer, and gelatin, and in the reaction time and temperature. The molecular weight of grafted poly(methyl methacrylate) (g-PMMA) and the branching frequency were measured and thermogravimetric analysis of gelatin-g-PMMA was carried out. The obtained gelatin-g-PMMA was insoluble in water because of the high molecular weight. The molecular weight of g-PMMA increased with the increase in the reaction time and MMA concentration, but decreased with the increase in the KPS concentration and reaction temperature. The branching frequency of the grafted polymer was increased with the increase in the reaction time and temperature, and the concentration of KPS and MMA. Thermogravimetic analysis shows that 10% weight loss temperatures of gelatin-g-PMMA were increased with the grafted PMMA contents of the grafted polymer.
젤라틴에 대한 Methyl Methacrylate 유화그라프트 공중합(I) -유화제, 개시제 및 단량체 농도가 그라프트 공중합에 미치는 영향-
박찬헌,박천욱 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.6
Emulsion graft copolymerization of methyl methacrylate(MMA) onto gelatin in aqueous solution by potassium persulfate(KPS) with sodium lauryl sulfate(NaLS) as an emulsifier was carried out at the various concentrations of emulsifier, initiator, and monomer. Gelatin conversion, MMA conversion, graft yield, and grafting efficiency of the emulsion graft copolymerzation were higher than those of graft copolymerization in the absence of emulsifier. The graft yield and the amount of hompolymer ware increased because of the acceleration of free radical formation with initiator concentration. The graft yield and grafting efficiency were increased with MMA concentration generally, but at the higher concentration of MMA the grafting efficiency was decreased slowly owing to increase of homopolymer formation.
박찬헌 한국기술사회 2000 技術士 Vol.33 No.3
In recent years, disputes are on the increase that noise and vibration by construction equipments and blasting do damage to livestock farming families around construction sites in the construction of a road or a railway. Therefore, the following ways of improvement were presented in solving the existing problems of livestock disputes. $.$ To minimize the damage of livestock farming families by effect assessment of noise and vibration in the region expected to be damaged before the start of construction $.$ To maintain a thorough management system that can reduce noise and vibration during construction work $.$ To apply an adequate measurement method of noise and vibration taking field conditions into consideration
絹織物의 精練條件變化가 練減率 및 絹絲蛋白質 아미노기의 定量的 變化에 미치는 影響
都成國,朴燦憲 東亞大學校 1986 東亞論叢 Vol.23 No.1
Since the degumming of silk fabrics with alkaline solutions has been suspected of causing some degradation of silk fibroin and different degumming conditions have influenced the degumming ratio, raw silk fabrics were treated with aqueous solutions of Na₂CO₃, marseilles soap, Na₂CO₃-marseilles soap(2:1, w/w), and Na₂CO₃-marseilles soap (1:2, w/w) under different conditions such as the variation of time, concentration and temperature to investigate the extent of damage to the silk fabrics and to infer the removed quantity of sericin by reaction of degummed silk fabric with ninhydrin solution, which indicated the quantitative change of amino group content in polypeptide chains. The degumming ratio varied with different degumming conditions but the maximum value was approximately 24% in all conditions except soap solution degummed fabrics(max. ca. 17%). Especially, in the case of 15% solutions of Na₂CO₃ and Na₂CO₃-Marseilles soap(2:1, w/w) at 100℃, it reached about 20% even in 30 minutes. The increase in amino group content in silk fabrics showing their degumming ratios of more than about 20% was considered as the damage to the silk fabrics due to the some degradation of silk fibroin.
李文澈,朴燦憲 경성대학교 1983 부산수산대학 논문집 Vol.4 No.4
The rate of dyeing and equilibrium adsorption of angora rabbit fiber with monobasic acid dyes, C. I. Acid Orange 7, C. I. Acid 88 has been investigated, as compared with wool fiber. From these values, the following results has been obtained. 1) The rate of dyeing or adsorption for angora rabbit fiber with monobasic acid in buffer solution was higher slightly than that for wool. 2) The difference in the rate of dyeing between C. I. Acid Orange7 and C. I. Acid Red 88 for angora rabbit fiber was not appreciably in initial stage. 3) The rate of dyeing for angora rabbit fiber with C. I. Acid Orange 7 was influenced strongly by pH values and salt concentration.